Research Article
One-Step Synthesis of the Nitrogen and Sulfur Codoped Carbon Dots for Detection of Lead and Copper Ions in Aqueous Solution
Figure 1
(a) The TEM image (the inset is HRTEM image) of the NS-CDs, (b) the particle size distribution of the NS-CDs, (c) the UV-visible absorption, and (d) the luminescence decay curve of NS-CDs, respectively.
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